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02 Olds intrigue problems

My car was leaking coolant and my mechanic said the leaking was coming from the heater core. Had the heater core rebuilt and car is still leaking coolant. After parking the car for the evening, in the morning I check the coolant level and the level in the plastic tank is low. Upon opening the tank to add coolant, the coolant wooshes up and the level comes up to normal cold level and coolant light does not come on. If I start the car and the low coolant light is on, if I drive the car for 10 to 20 miles, the low coolant light goes off. The running temp is normal; no overheating happening. Occasionally when car is ideling, (at stop light) I have a loss of heat. The air becomes just luke warm and then as I accelerate or bring rpms to 1100, air gets warmer. The car has 197,000 miles on it and the water pump has never been replaced. I was reading that a leaking water pump can mimmick a leak from the heater core. Cooling system was pressure tested at 15. My mechanic said it may need the head gasket replaced but not exactly certain and the shop wants to use the CarGo block sealer since the head gasket repair would be very costly. Uncertain if the use of the block sealer will fix the problem. Which would you recommend - replacing the water pump, using the CarGo or both? Please help! Thanks A Million!!!

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: I have a 2002 Olds

most likely heater core and to check if the water pump working..allow vehicle to warm up enough for thermostat to open and check for circulation in the fluid inside the radiator..if see it..water pump works.

Posted on Jan 28, 2011

  • 1608 Answers

SOURCE: My 2006 Pontiac Torrent cooling

Even if there were no hydrocarbons detected I am almost positive you have a bad head gasket.Usually the back head on the number one cylinder.Almost all the ones I have done with this exact problem has been the rear head and the number 1 cylinder.Hair line crack between the cylinder and water jacket.I always replace both head gaskets.Hope this helps.Good luck.

Posted on Mar 04, 2011

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